soc: wch: add generic vector table support

Add `VECTOR_TABLE_SIZE` Kconfig option to define the number of interrupt
and exception vectors based on the actual hardware specification.

Signed-off-by: Jianxiong Gu <[email protected]>

Author: recalci

soc/wch/ch32v/Kconfig

@@ -1,4 +1,5 @@
 # Copyright (c) 2024 Michael Hope
+# Copyright (c) 2024 Jianxiong Gu
 # SPDX-License-Identifier: Apache-2.0
 
 config SOC_FAMILY_CH32V
@@ -10,6 +11,13 @@ config SOC_FAMILY_CH32V
 
 if SOC_FAMILY_CH32V
 
+config VECTOR_TABLE_SIZE
+	int "Number of Interrupt and Exception Vectors"
+	range 20 256
+	help
+	  This option defines the total number of interrupt and exception
+	  vectors in the vector table.
+
 rsource "*/Kconfig"
 
 endif # SOC_FAMILY_CH32V

soc/wch/ch32v/qingke_v2a/Kconfig.defconfig.ch32v003

@@ -3,6 +3,9 @@
 
 if SOC_CH32V003
 
+config VECTOR_TABLE_SIZE
+	default 38
+
 config NUM_IRQS
 	default 48
 

soc/wch/ch32v/qingke_v2a/vector.S

@@ -6,6 +6,10 @@
 
 #include <zephyr/toolchain.h>
 
+#ifndef CONFIG_VECTOR_TABLE_SIZE
+#error "VECTOR_TABLE_SIZE must be defined"
+#endif
+
 /* Exports */
 GTEXT(__start)
 
@@ -15,7 +19,7 @@ GTEXT(__initialize)
 SECTION_FUNC(vectors, ivt)
 	.option norvc
 	j       __start
-	.rept 38
+	.rept   CONFIG_VECTOR_TABLE_SIZE
 	.word	_isr_wrapper
 	.endr